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Date: Thu, 19 Jul 2012 13:07:18 +0200
From: Milan Broz <gmazyland@gmail.com>
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Subject: Re: [dm-crypt] gpt over luks - entire data disk encryption
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To: Two Spirit <twospirit6905@gmail.com>
Cc: dm-crypt@saout.de

On 07/18/2012 11:46 PM, Two Spirit wrote:
> After some corruptions to my luks environment, I get an opportunity to make some upgrades to my setup.
> I need some help. I'm testing a raid5+1 environment, and would like to do whole data disk encryptions
> with GPT. once I partition the disk using GPT, I can't run the "cryptsetup luksClose". I've done
> whole disk encryption without a partition table with no problems, and I also have done luks encryption
> on a GPT partition without problems.
> 
> The only way I have found to be able to run luksClose is to blow away the partition table(which is not
> acceptable solution). I suspect that udevadm (running ubuntu-12.04) is involved as a /dev/mapper/raid51p1 
> exists. When I get rid of the /dev/mapper/raid51p1, and only the /dev/mapper/raid51 exists, I can then run "luksClose".

For now, use
kpartx -d -pp /dev/mapper/raid51
before you try to luksClose (kpart is part of multipath-tools if not packaged separately)

Milan